<!DOCTYPE html>
<html>
<head>
    <title>图书信息</title>
</head>
<body>
<h5>{{ info }}</h5>
{% if price <= 50.0 %}
<h5>很便宜哦！</h5>
{% else %}
<h5>好贵哦！</h5>
{% endif %}
</body>
</html>